yiu_fit_itm_2_msk ｜ item in p1 to mask size and position in p2

输入：物品、背景，以及指示物品在背景中位置尺寸的蒙版

输出：物品缩放移动到锰板所在位置的图片

Input: item, background, and mask indicating the position and size of the item in the background

Output: image of the item scaled and moved to the position of the manganese plate